Slow Cooker Lobster Thermidor Fondue Step-by-step instructions

Before you start

Before starting, make sure the lobster meat is cooked and roughly chopped into bite-sized pieces. If using frozen lobster, thaw it in the refrigerator overnight and pat it dry. Soften the cream cheese by leaving it at room temperature for about 30 minutes, then cut it into small cubes so it melts quickly.

Shred the Gruyère cheese if it is not already shredded. Measure the brandy and chop the fresh tarragon. Toast the brioche slices and cut them into points for dipping. Have a slow cooker ready — a 4-quart or larger model works well.

Instructions

Melt the Cheeses

1. 1Add the lobster and cheeses
   Place the cooked lobster meat in the slow cooker insert. Add the softened cream cheese and the shredded Gruyère cheese directly over the lobster. Pour the brandy over the top.
   Look for The cheeses are piled over the lobster, with brandy drizzled over.
   Tip Cut the cream cheese into small cubes so it melts evenly.
2. 2Melt and stir
   Cover the slow cooker and set it to low. Let the mixture heat for 45 to 60 minutes, stirring every 15 minutes, until the cheeses are fully melted and the mixture is smooth and bubbling gently.
   Look for The dip is smooth, with no visible shreds of cheese remaining.
   Tip Stir gently to keep the lobster chunks intact.

After the first phase, the slow cooker should hold a lumpy mixture of lobster, cream cheese, and Gruyère. The cheeses will start to soften and melt around the edges.

Give it a stir — you should see a smooth, creamy sauce beginning to form, with the lobster pieces suspended in it. The brandy will have cooked off, leaving a rich, savory aroma. The mixture should be fully melted and smooth before moving on.

Add the Tarragon

3. 3Finish with tarragon
   Once the fondue is fully melted and smooth, stir in the chopped fresh tarragon. Continue stirring until the tarragon is evenly distributed and the fondue is hot and bubbling.
   Look for Green flecks of tarragon are scattered throughout the golden fondue.
   Tip Add the tarragon at the end to keep its bright flavor.
4. 4Keep warm
   Reduce the slow cooker to the warm setting. The fondue will stay silky and dippable for hours. If it thickens too much, stir in a splash of warm milk or water.
   Look for The fondue is warm, velvety, and ready to serve.
   Safe temperature 145°F (63°C) internal temperature (shellfish)
   Tip Serve directly from the slow cooker to keep it warm.

Once the tarragon is stirred in, the fondue should be a uniform golden color with green flecks throughout. It should be thick, creamy, and gently bubbling. The texture should be silky, not stringy or grainy. The lobster pieces should be tender and warm. The fondue should coat the back of a spoon and slowly drip off. This is the point where it is ready to serve.

Serve with Brioche

5. 5Serve with brioche
   Arrange the toasted brioche points on a platter alongside the slow cooker. Each guest can dip the brioche into the warm fondue, pulling up a long, cheesy ribbon with pieces of lobster.
   Look for The brioche picks up a slow, melted cheese pull with tender lobster.
   Tip Toast the brioche just before serving so it stays crisp.

When serving, the fondue should be warm and velvety, with a slow, melted cheese pull when a brioche point is dipped in. The brioche should be crisp on the outside and soft inside, perfect for scooping up the rich, cheesy mixture. The lobster pieces should be visible and tender. The fondue should hold its shape on the spoon but flow smoothly when poured. Enjoy immediately.

Common mistakes

One common mistake is overheating the fondue, which can cause the cheese to separate and become greasy. Keep the slow cooker on low, and stir occasionally to distribute the heat. Another mistake is adding the tarragon too early, which dulls its flavor — add it at the end.

If the fondue becomes too thick, thin it with a little warm milk or broth, but add it gradually to avoid thinning it too much. Finally, do not overcook the lobster — since it is already cooked, it only needs to be heated through.

How to tell it’s done

The fondue is done when all the cheese is fully melted and the mixture is smooth, glossy, and gently bubbling at the edges. There should be no visible shreds of cheese, and the texture should be thick enough to coat a spoon but still fluid enough for dipping.

The lobster pieces should be warmed through, and the tarragon should be evenly distributed. If you want to check the temperature, the fondue should be at least 145°F (63°C) throughout. Keep it on the warm setting while serving.

• Shellfish: 145°F (63°C) in the thickest part